Skip to main content
CaralogyCaralogy
HomeBrandsRoad TripBudgetDuelGuides
Caralogy

The car comparison platform. Physics simulation, road trips, real costs.

Navigation
All brandsCar duelRunning costsMotorwayMethodology
Simulators
Motorway simulatorRunning costsPerformance duel
Brands
VolkswagenBMWMercedesToyotaTeslaAudi
FRENDEESIT
© 2026 Caralogy · All rights reserved
  1. Home
  2. /Consumption
  3. /Sports Cars
911vsCaymanPetrol
  • MotorwayMotorwayRange and charging
  • PerformancePerformance0-100, top speed
  • ConsumptionConsumptionYearly cost
  • Specs911 · Cayman

Porsche 911 Carrera Cabriolet 991.2 vs Porsche Cayman S PDK: which is cheaper to run?

What each kilometre costs, depending on your driving profile and how you charge. Annual projection and cumulative savings over 10 years.

sports car · 2017 vs 2010 · 15,000 km/an · Mixed · Petrol 95 2.17 €/L · Methodology
Annual mileage
15,000 km
5,000 km50,000 km
Driving mix

30 % City · 50 % Road · 20 % Motorway

Fuel price
Petrol 95 2.17 €/L · Diesel 2.38 €/Lprix-carburants.gouv.fr — moyenne nationale du 05/10/2026 ; EDF Tarif Bleu Base au 01/08/2026 ; DC autoroute : moyenne des réseaux sans abonnement

Result · yearly energy cost

APorsche 911 Carrera Cabriolet 991.2

3,340 €per year

10,3 L/100 km weighted · 22.26 € per 100 km · 1 539 L per year

Gap820 € per yearin favour of the 911 Carrera Cabriolet (−20 %)≈ 378 L petrol 95
BPorsche Cayman S PDK

4,160 €per year

12,8 L/100 km weighted · 27.73 € per 100 km · 1 917 L per year

The verdict changes with your usage
ProfileSplitAA · 911BB · CaymanGap
City70 / 25 / 570 % city · 25 % road · 5 % motorway3,650 €5,521 €1,870 € · 911
Mixed30 / 50 / 2030 % city · 50 % road · 20 % motorway3,340 €4,160 €820 € · 911
Long-distance10 / 40 / 5010 % city · 40 % road · 50 % motorway3,030 €3,369 €338 € · 911

Cumulative saving for the 911 Carrera Cabriolet

1 year
820 €
3 years
2,461 €
5 years
4,102 €
10 years
8,204 €

Energy only. Excludes purchase, insurance, servicing, depreciation.

What produces these figures

WLTP combined
10.2 L/100 km · 10.1 L/100 km
Powertrain
Combustion · Combustion
Power
375 ch · 324 ch
Kerb weight
1,500 kg · 1,375 kg

Other similar comparisons

PorscheVSBMW

911 Carrera Cabriolet vs Z4 M40i

gap 1 102 €/year
BMWVSPorsche

Z4 M40i vs Cayman S PDK

gap 2 196 €/year
PorscheVSBMW

911 Carrera Cabriolet vs Z4 M40i

gap 1 172 €/year
BMWVSPorsche

Z4 M40i vs Cayman S PDK

gap 2 266 €/year

Frequently asked questions

On a 100 km mixed trip, the Porsche 911 Carrera Cabriolet is about 20% cheaper than the Porsche Cayman S PDK with default parameters. This ratio shifts with your actual energy prices - simulate for your profile.

The Porsche 911 Carrera Cabriolet is cheaper across all distances with default rates. If your energy prices differ significantly, simulate to see the real impact on your budget.